Island



C. H. PERKINS.

Horseshoe Machine.

Patented Oct. 25, 1864.

w e W z'fnesses: M

UNITED STATES CHARLES H. PERKINS, OF PROVIDE THE UNION HOBSESHOE (JPATENT ()rrIcE.

NOE, RHODE ISLAND, ASSIGNOR TO OMPANY, OF SAME PLACE.

MACHINE FOR MAKING HORSESHOES.

Specification forming part of Letters Patent No. 44.538, dated October25, 1864.

Punching Horseshoes; and I do hereby declare that the followingspecification, taken in connection with the drawings making a 1 part ofthe same, is a full,clear, and exactde- I scription thereot'.

Figure 1 is a perspective view of the whole machine. Figs. 2 and 3 arerespectively a front view and cross-section of the die and punches.

The machine which is described in this patcut is designed to be used inconnection with another machine for dressing blanks for horsei shoes,for improvements in which otherLetters Patent have been granted to me,bearing even date herewith.

The two machines are intended to be used together for the purpose ofmaking a com- 1 plete set of nail-holes in a shoe-blank; but

each may be used for the purpose for which it is adapted independentlyof the other.

The practical difficulty which has been experienced in the use of allmachines for punch ing the nail-holes in horseshocs is the he I quencywith which the punches are broken. This tendency to break arises fromthe fact that the punches in all other machines are required to passentirely through the metal of l the shoe, and, being necessarilyslender, if

bent or sprung to one side, as they are liable to be, their points willstrike as they prick through the blank against the die upon the f underside. In order to overcome this difiiculty, Iemploy two separatemachines for ac- I complishing the punching of the holes, one of whichmakes the holes nearly but not quite through the metal, leaving upon theunder side protuberances in the form of blisters, caused by the end ofeach punch forcing the metal outwardly, and the other cuts off theseblisters, leaving the hole exposed.

The machine represented in the accompany- 5 ing drawings is the first ofthe two. It con- I sists of a substantial frame or bed piece, A, uponthe top of which is placed a guide, B. l U is acrosshead, fitted to riseand fall upon I this guide. To this cross-head are attached the seriesof punches a a a a, arranged in a row, at the distances apart at whichit is designed the holes shall be in the shoe, and secured inappropriate sockets by clamp-screws. t

T The cross-head is made to rise and fall by means of the shackle-bars DD, worked by eccentrics l D upon the end of the shaft D, to which the 5power is applied. Uponthetop of thebed-piece l isplacedadie,E,whichhasalongitudiualchannel, Z), cut in it, as shown incross-section in Fig. 2. This channel should be greater in length thanthe combined width of the series of punches, and should be wide enoughto admit the entrance of the punches to the depth required.

The blank of which the shoe is to be made, as is now practiced inmachine-made shoes, is creased and punched before it is bent andhammered. The punches are therefore, in this instance, arranged in astraight line, and k the blank is placed beneath them and over thechannel in the die E and held by the keep ers 00. As the punches comedown, they force l the particles of metal opposite their points 1 intothe channel I), which should be considerably deeper than the punchesdescend, but i do not break through them. This can be readily effectedby regulating the extent of motion to be given to the cross-head for anygiven thickness of blank. When the blank is withdrawn, the under surfacewill present the appearance of a series of blisters, as beforementioned, although the holes are punched to a depth equal to thethickness of the blank.

The advantage which results from a die of this character, in combinationwith a series of punches, over one which is divided by parti tions, or,what would be the equivalent, a series of holes corresponding to thepunches, as heretofore used, is obvious, from the fact that theresistance which the punches will encounter will be greatly increased bythe presence of such partitions forming so many unyielding supports forthe metal. Another advantage is, that as the punches are not intended toating substantially as and for the purposes" specified.

CHARLES H. PERKINS. Witnesses:

J. D. THURSTON, THOMAS ALDRICH.

